Effects of the Mediterranean Diet on Cardiovascular Risk Profile in Men and Women (ALIMED)
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Purpose
The purpose of this study is to document differences between men and women in changes in metabolic variables associated with cardiovascular risk in response to a 4 weeks isocaloric controlled nutritional intervention based on the Mediterranean diet in which all foods and drinks are provided to subjects. The investigators hypothesize that the decrease in LDL-cholesterol will be more important in men than in women.
| Condition | Intervention |
|---|---|
|
Cardiovascular Diseases |
Other: Controlled nutritional intervention based on the Mediterranean diet |
| Study Type: | Interventional |
| Study Design: | Allocation: Non-Randomized Endpoint Classification: Efficacy Study Intervention Model: Parallel Assignment Masking: Open Label Primary Purpose: Prevention |
| Official Title: | Gender Differences in Response to the Mediterranean Diet |
- Cardiometabolic outcomes [ Time Frame: At baseline (at the beginning of the intervention) and at the end of the intervention period (4 weeks). ] [ Designated as safety issue: No ]Total cholesterol, LDL-cholesterol, HDL-cholesterol, triglycerides, apolipoprotein (apo) B, apo A-1 and apo A-2 plasma concentrations, systolic and diastolic blood pressure, glucose and insulin concentrations during a 180-min oral glucose tolerance test, insulin sensitivity, CRP and Interleukine-6 levels, oxidized-LDL, E-selectin, ICAM-1 and VCAM-1.
- Nutritional variables [ Time Frame: At baseline (at the beginning of the intervention), at the end of the intervention period (4 weeks) and at 6-months post-intervention (28 weeks). ] [ Designated as safety issue: No ]Dietary intakes
- Eating behaviors [ Time Frame: At baseline (at the beginning of the intervention) and at the end of the intervention period (4 weeks) ] [ Designated as safety issue: No ]Restraint, disinhibition, and susceptibility to hunger
- Appetite ratings [ Time Frame: At baseline (at the beginning of the intervention) and at the end of the intervention period (4 weeks) ] [ Designated as safety issue: No ]Desire to eat, hunger, fullness, and prospective food consumption
- physical activity habits [ Time Frame: At baseline (at the beginning of the intervention) and at the end of the intervention period (4 weeks) ] [ Designated as safety issue: No ]Weekly questionnaire about physical activities, a validated 3-day physical activity record (two weekdays and one weekend day)
- Anthropometric measurements [ Time Frame: At baseline (at the beginning of the intervention), at the end of the intervention period (4 weeks) and at 6-months post-intervention (28 weeks) ] [ Designated as safety issue: No ]Height, weight, body mass index, waist and hip circumferences,
| Enrollment: | 70 |
| Study Start Date: | October 2007 |
| Study Completion Date: | October 2010 |
| Primary Completion Date: | April 2010 (Final data collection date for primary outcome measure) |
| Arms | Assigned Interventions |
|---|---|
|
Experimental: Men and Mediterranean diet
Men who are assigned to a 4 weeks experimental diet formulated to be concordant with characteristics of the traditional Mediterranean diet.
|
Other: Controlled nutritional intervention based on the Mediterranean diet
Men are assigned to a 4 weeks isocaloric controlled nutritional intervention based on the Mediterranean diet (MedDiet) in which all foods and drinks are provided. The respective percentages of kcal derived from lipids, carbohydrates, protein and alcohol are respectively of 32%, 48%, 15% and 5%. Habitual energy intake of each participant is established by averaging energy requirements estimated by a validated food-frequency questionnaire (FFQ) and energy needs as determined by the Harris-Benedict formula. Body weight is measured on weekdays and total energy provided is revised if necessary for minimizing body weight fluctuations. This intervention period is preceded by a 4 weeks uncontrolled run-in period based on the Canada's Food Guide.
|
|
Experimental: Women and Mediterranean diet
Women who are assigned to a 4 weeks experimental diet formulated to be concordant with characteristics of the traditional Mediterranean diet.
|
Other: Controlled nutritional intervention based on the Mediterranean diet
Women are assigned to the same intervention than men in order to compare men and women metabolic response to the MedDiet.
|
Detailed Description:
Nutritional interventions promoting the adoption of the traditional Mediterranean diet (MedDiet) are known to have significant and beneficial effects on cardiovascular disease (CVD) risk profile. On the other hand, recent evidence suggests that women respond differently to diet than men. No study has yet compared men and women metabolic response to the MedDiet in a controlled metabolic context in which all foods and drinks consumed are provided to the participant prepared by the research team. Therefore, we do not know whether being fed a MedDiet in controlled conditions would have similar health benefits in men and women. The purpose of this study is to document differences between men and women in changes in metabolic variables associated with cardiovascular risk in response to a 4 weeks isocaloric controlled nutritional intervention based on the MedDiet in which all foods and drinks are provided to subjects. We hypothesize that the decrease in LDL-cholesterol will be more important in men than in women. In this parallel controlled trial, both men and women are assigned to the same 4 weeks experimental diet formulated to be concordant with characteristics of the traditional MedDiet. Data will be collected before and after the controlled nutritional intervention based on the MedDiet.
Eligibility| Ages Eligible for Study: | 25 Years to 50 Years |
| Genders Eligible for Study: | Both |
| Accepts Healthy Volunteers: | No |
Inclusion Criteria:
- Men and premenopausal women from de Quebec City metropolitan area.
- Slightly elevated LDL-cholesterol concentrations (3.4-4.9 mM) or total cholesterol to HDL-C ratio ≥ 5.0
- At least one of the four following factors of the metabolic syndrome: 1) waist circumference > 94 cm in men and > 80 cm in women; 2) TG > 1.7 mmol/L; 3) fasting glycemia between 6.1 and 6.9 mmol/L and 4) blood pressure concentrations ≥ 130 / 85 mm Hg.
- Age: between 25 to 50 years
- Stable body weight (+/- 2.5 kg) for at least 3 months before the beginning of the study
- In women, a regular menstrual cycle for the last 3 months
Exclusion Criteria:
- Subjects with endocrine disorders, cardiovascular events, type 1 or 2 diabetes and those using medication that could affect dependent variables measured (namely lipid-lowering, hypoglycemic, insulin sensitizers and anti hypertensive medication)
- Smokers
- Subjects with history of alcoholism
- Subjects with food allergies or food aversion that could impede compliance to the Mediterranean diet
- Pregnant women and those using systemic hormonal contraceptives
Contacts and Locations| Canada | |
| Institute of Nutraceuticals and Functional Foods (INAF), Laval University | |
| Quebec, Canada, G1V0A6 | |
| Principal Investigator: | Simone Lemieux, Ph.D., Dt.P. | Department of food sciences and nutrition / Institute of Nutraceutical and Functional Foods (INAF), Laval University |
More Information
No publications provided
| Responsible Party: | Simone Lemieux, Professor, Laval University |
| ClinicalTrials.gov Identifier: | NCT01293344 History of Changes |
| Other Study ID Numbers: | ALIMED-2007-180 A3 R-2 |
| Study First Received: | February 9, 2011 |
| Last Updated: | October 5, 2011 |
| Health Authority: | Canada: Canadian Institutes of Health Research (CIHR) |
Keywords provided by Laval University:
|
Cardiovascular diseases Controlled nutritional intervention Sex differences Women Men Cardiovascular risk |
Lipid profile Blood pressure Insulin sensitivity Inflammatory markers Endothelial function Oxidative stress |
Additional relevant MeSH terms:
|
Cardiovascular Diseases |
ClinicalTrials.gov processed this record on May 19, 2013